2018/04/26 by Tomoki Nosaka, Dario Rosa, Junggi Yoon · 1 citation
Physics and Astronomy · #cond-mat.str-el #hep-th #nlin.CD #quant-ph
paper · pdf · doi:10.1007/jhep09(2018)041
44 pages, many figures
arxiv created 2018/04/26 · arxiv updated 2018/09/26
We study the onset of RMT dynamics in the mass-deformed SYK model (i.e. an SYK model deformed by a quadratic random interaction) in terms of the strength of the quadratic deformation. We use as chaos probes both the connected unfolded Spectral Form Factor (SFF) as well as the Gaussian-filtered SFF, which has been recently introduced in the literature. We show that they detect the chaotic/integrable transition of the mass-deformed SYK model at different values of the mass deformation: the Gaussian-filtered SFF sees the transition for large values of the mass deformation; the connected unfolded SFF sees the transition at small values. The latter is in qualitative agreement with the transition as seen by the OTOCs. We argue that the chaotic/integrable deformation affect the energy levels inhomogeneously: for small values of the mass deformation only the low-lying states are modified while for large values of the mass deformation also the states in the bulk of the spectrum move to the integrable behavior.